I like bikes.
I like them as manufactured objects, their engineering aesthetics appeal to me.
I like them as machines, they're neat and sort of easily within reach to work with.
I like the skills element when riding them for fun.
I like the fatigue element when riding them for exercise.
I like the utility aspect of them, the way they act as force multipliers enabling a human to travel useful distances in an acceptable amount of time only using his/her own power.